Pianofuck

You've heard about Brainfuck, well, this is Pianofuck. It's a stack-based esoteric "programming language" that could hurt your ears. To write a program, you play keys on the keyboard. Try it out on this page and watch your program execute (listen to it as well!).

There are two basic commands: POP and PUSH. To pop an item off the stack, play D on the piano. To push an item, play C on the piano followed by your number in binary (D for 0, E for 1) or G/F for the saved variables, if available. When you're finished play C again.

We also have arithmetic functions. Play E followed by one of the following:

• F: to add the top two numbers from the stack.
• G: to subtract the top two numbers from the stack.
• A: to multiply the top two numbers from the stack.
• B: to divide the top two numbers from the stack.
• C: to absolute value the top number on the stack.
• D: to duplicate the top number on the stack.
• E: to perform modulo division with the top two numbers from the stack.

And there's a bit of logic available. Play F followed by one of the following:

• G: a NOT operator. If the top number on the stack is a 0, makes it a 1. Otherwise, 0.
• A: greater than with the top two numbers on the stack. 1 if true, 0 if false.
• B: less than with the top two numbers on the stack. 1 if true, 0 if false.
• C: equals with the top two numbers on the stack. 1 if true, 0 if false.

Lastly, you can output the top item from your stack by playing G followed by one of the following:

• A: outputs it as a number.
• B: outputs it as an ASCII character.
• C: saves it for later use in Slot A (only value per slot).
• D: saves it for later use in Slot B (only value per slot).

Playing this Piano

Click the S key to make a play the C note, then D to make D4 and so on up until B4 with the K key.

To hit a black key, use SHIFT.

To move up and down the piano, click ⬅︎ and ⮕. Your current section is 4

C D E F G A B

    OUTPUT: